GestureDragUpdateCallback typedef Null safety

void GestureDragUpdateCallback(
  1. DragUpdateDetails details

Signature for when a pointer that is in contact with the screen and moving has moved again.

The details object provides the position of the touch and the distance it has traveled since the last update.

See DragGestureRecognizer.onUpdate.


typedef GestureDragUpdateCallback = void Function(DragUpdateDetails details);